691 is an odd 3-digits prime number following 690
and preceding 692 . In scientific notation, it is written as 6.91 × 10^2.
The sum of its digits is 16. It has a total of 1 prime factors and 2 positive divisors.
There are 690 positive integers (up to 691) that are relatively prime to 691.
691 has 2 divisors, whose sum is 692
The reverse of 691 is 196
Previous prime number is 1
Is Prime? yes
Number parity odd
Number length 3
Sum of Digits 16
Digital Root 7
Name
six hundred ninety-one
Scientific notation
6.91 × 10^2
Engineering notation
6.91 × 10^0
Prime Factorization
691
Composite number
ω
Distinct Factors
1
Total number of distinct prime factors
Ω
Total Factors
1
Total number of prime factors
rad
Radical
691
Product of the distinct prime numbers
The prime factorization of 691 is 691.
Since it has a total of 1 prime factors.
2 , 9 , 92 , 17 , 37 , 104 , 5017 , 7716 , 56425 , 65753 , 848659 , 701762 , 3477231 , 3900825 , 685872 , 99377971 , 378882315 , 77828116 , 6824228992 , 2905734157
n×2
1382
n×3
2073
n×4
2764
n×5
3455
n÷2
345.5
n÷3
230.33333333333
n÷3
172.75
n÷5
138.2
n2
477481
n3
329939371
n4
227988105361
n5
157539780804451
2 √n
26.28687885619
3 √n
8.8408227294029
4 √n
5.1270731276421
5 √n
3.6973929557843
2 divisors
τ
Total Divisors
2
Total number of the positive divisors of n
σ
Sum of Divisors
692
Sum of all the positive divisors of n
s
Aliquot Sum
1
Sum of the proper positive divisors of n
A
Arithmetic Mean
346
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
26.305892875932
Returns the nth root of the product of n divisors
H
Harmonic Mean
1.9971098265896
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 691 can be divided by 2 positive divisors.
The sum of these divisors (counting 691) is 692, the average is 346.
Base
System
Value
2
Binary
1010110011
3
Ternary
221121
4
Quaternary
22303
5
Quinary
10231
6
Senary
3111
8
Octal
1263
10
Decimal
691
12
Duodecimal
497
16
Hexadecimal
2b3
20
Vigesimal
1eb
36
Base36
j7
md5
10a5ab2db37feedfdeaab192ead4ac0e
sha1
3da7e2c2144502d7115bee98a0dfe95030345b43
sha256
809e63d5c8aa03af112d17361058d0d8955f6d8e1e7591487d593dad276f9757
sha512
63d6c2f0dc431a56725667829dc104a66dee682543bd24bc23b63d559030857791befc2ec34dfe08c0e48543283249e974d3772e1ecd7e4470cd67c319a32eaa
ripemd-160
7cbbbf991f508d9c54fb7304f6052d6c337f0cea
Diameter
1382
Circumference
4341.6810472611
Area
1500050.8018287
Volume
1382046805.4182
Surface area
6000203.2073148
Circumference
4341.6810472611
Perimeter
2764
Area
477481
Diagonal
977.22157159981
Surface area
2864886
Volume
329939371
Space diagonal
1196.8471080301
Perimeter
2073
Area
206755.3379122
Altitude
598.42355401505
Surface area
206755.3379122
Volume
38883727.769087
Height
325.7405238666